Improvement of fatigue strength of a Mg-Zn-Zr alloy by integrated extrusion and equal-channel angular pressing

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• 作者：Alexei Vinogradov^a ; ^b ; Dmitry Orlov^a ; ^c ; ^{dmytro.orlov@monash.edu} ; Yuri Estrin^c
• 关键词：Extrusion ; Equal channel angular pressing ; Magnesium alloys ; Fatigue strength ; High-cycle fatigue
• 刊名：Scripta Materialia
• 出版年：2012
• 期刊代码：157_13596462
• 类别：et
• 出版时间：July, 2012
• 卷：67
• 期：2
• 页码：209-212
• 文件大小：405 K

摘要

Fatigue performance under axisymmetric push-pull loading of a magnesium alloy Mg-6Zn-0.5Zr (ZK60) after processing by integrated extrusion and equal-channel angular pressing was investigated. Such processing was shown to nearly treble the endurance limit of the alloy, raising it to 160 MPa. It was established that the high-cycle fatigue performance of ZK60 is primarily controlled by dislocation substructure, grain size and crystal orientation, rather than the presence of intermetallic particles.